Which of the following strongly affects the movement of air masses along the Earth's surface? A. in nitrogen content
B. differences in air pressure
C. the Earth's rotation
D. differences in carbon dioxide content

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"